Becker Avionics
General Description
Scope of Functionality
DV64440.03 Issue 09 November 2019
ACU6100
17
Signal Tones
•
Monitoring of up to 10 signal tones. 8 tones can be activated by discrete control lines from
external (aural alert tones).
Built-In Tests
•
The ACU61 device has different built-in tests with optical indication of the test results.
•
The tests monitor the system equipment and some internal circuits.
o
PBIT: A system self-test starts after power-on.
o
CBIT: A background test routine runs continuously during normal operation.
o
IBIT: An additional test can be manually started.
Emergency Operation (Back-Up Operation)
•
The emergency operation (back-up operation) can be started manually through the
selection switch for the back-up function on the ACU61.
•
If there is total power failure, the headsets of pilot and copilot are automatically connected
to:
o
Headset 1 (normally the pilot) is connected to TX1 and FIX1.
o
Headset 2 (copilot) to TX2 and FIX2.
•
The selection switch for the back-up function is not connected through the interface it must
be hardwired.
Slave Operation
•
If there is a total loss of pilots or copilots ACU61 (ACU1, ACU2), the device can be
connected in parallel to the remaining ACU61 through the slaved mode.
•
The selection switch for the SLAVE function is not connected through the interface it must
be hardwired.
Interface
•
Control data are transferred through a redundant CANbus interface.
Special Functions
•
Audio Control Units are factory configurable to different operation profiles, e.g. disabling
certain transceiver or receiver accessibility in the cabin / passenger area.
